Which components are "stupid good"?

Tube Research Dude (also the Samson amps). Tube Audio Labs TADAC (DAC). Eagle amplifiers.

I have to include the Vh Audio V/Caps into this group..Though maybe not considered a component,they sure qualify for the " Stupid Good " category...Both the CuTf and the TfTf,are exceptional..It just becomes a matter of
which version Cap best fits your needs.
I tried both versions and ended up with the CuTf caps..Not cheap,but considering the upgrade in performance,they are well worth the price.....

The Sangeon hdt-1 HD radio at under $200 is a steal ,buy the Marnum Dynalabs whip antenna for $100 and you have a killer setup ,just remember to use a decent power cord , and at least a $100 set of interconnects.

15" Tannoy Gold's in an appropriate cabinet is the best deal I can think of.
Mastersound's Integrateds are also pretty hard to beat for the price.

I know this will be dismissed by most as bunk because most super budget wonderfinds are usually a load. To me, the Play Station 1, as hyped in some circles, does actually sound very good. I'm not saying it knocks off mega-buck sources, I certainly have nothing like that to compare it to. But for $15 off CL this thing goes way past "stupid good", on the price/perf ratio, it's insane good!
Another bit of blasphemy, I suggest anyone with high efficiency speakers should have a t-amp for back-up. My PS1 cdp, XLO VDO cables, Hlly Tamp-20 amp, "white lightning moonshine" speaker cables, and Klipsch Forte II speakers comprise an incredibly enjoyable budget system. Did I say budget? Total outlay so far: $430!
Ultimate system that does everything right? No. Ultimately cheap and very enjoyable? Yes! Plays loud and will hit the bottom note on "Cosmic Hippo"! Super has been super fun!